<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<meta http-equiv="X-UA-Compatible" content="ie=edge">
	<title>CSS-position-static</title>
	<link rel="stylesheet" href="https://cdn.bootcss.com/normalize/8.0.0/normalize.css">
	<style>
		.container{
			background-color: #868686;
			width: 100%;
			height: 20000px;
		}
		.content{
			background-color: yellow;
			width: 100px;
			height: 100px;
			position: fixed;/* 这里使用了fixed */
		}
	</style>
</head>
<body>
<div class="container">
	<div class="content">
	</div>
</div>
</body>
</html>
